CODEWITHSUNDEEP
for-loopjinja2ansible-2.x
Bidyut
Bidyut

Reputation: 993

Accessing loop variable outside loop in Jinja2

We are writing a for loop in Jinja2, which will keep on concatenating the list variable to a string until the end of the list.We are storing the string to a variable. After the loop completes, we want to print the variable.

The code to perform that is as follows

{% set HOSTLIST = groups['master'] | map('extract', hostvars, ['ansible_default_ipv4', 'address'])| list %}
{% set TEST = "spark://" %}
{% for host in HOSTLIST %}
     {% set sample = TEST + host  %}
     {% set TEST = sample+',' %}
{% endfor %}

{{ TEST }}

Can anybody point me, where we are doing a mistake.

Our output is as follows:

 spark://

But the expected output should be like:

 spark://192.168.49.111:7077,192.168.49.112:7077,

Upvotes: 0

Views: 1041

Answers (1)

Konstantin Suvorov
Konstantin Suvorov

Reputation: 68229

Why not use it like this?

spark://{{ groups['master'] | map('extract', hostvars, ['ansible_default_ipv4', 'address']) | map('regex_replace','$',':7077') | list | join(',') }}

Your original request to modify outer-scope variable inside a loop is solved only with jumping through some hoops, see Jinja2: Change the value of a variable inside a loop.

Upvotes: 1

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